Spoke-tenoning machine.



No. 640,895. Patented Ian. 9, I900.

F. w Fa'SRsTER. SPOKE TENUNING MACHINE (Application filed July 18, 1899.) (No Model.)

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FRIEDRICH \VILI'IELM FGRSTER, OF BURLINGTON, IOWA.

SPOKE-TENONING MACHINE.

SPECIFIGATIOK forming part of Letters Patent No. 640,895, dated January 9, 1900.

Application filed July 18, 1899- Serial No. 724,286. (No model.)

To c'tZZ whom, it may concern:

Be it known that I, FRIEDRICH WILHELM F6RSTER, of Burlington, in the county of Des Moines and State of Iowa, have invented certain new and useful Improvements in Spoke- Tenoning Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in spoke-tenoning machines, and more particularly to that class of machines designed for use in repair-shops and in small factories, the object of the invention being to provide a portable device which shall be simple in construction, comparatively cheap to manufacture, and which shall be capable of being easily operated by unskilled labor.

With these objects in view my invention consists in certain novel features of construction and combinations of parts, as will be hereinafter more fully described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in perspective of my invention- Fig. 2 is a view in transverse section on the line w as of Fig. 1, and Fig. 3 is a view in side elevation of a portion of said machine.

S represents a yoke provided with a pair of forwardly-extending arms A A, the arm A being rigidly secured to said yoke, while the arm A is pivotally connected thereto. These arms A A terminate at their forward ends in semicylindrical clamping-jaws G G, which are encircled by a loop or endless band H. This loop or band is rigidly secured to clamping-jaw G and at a point opposite its point of attachment to said jaw is provided with a screw-threaded hole for the reception of the screw-bolt J, by means of which the jaw G of pivotal arm A may be looked around a spoke orother article. Instead of forming the that when secured together by the pins or riv- 1 ets P P (which latter also connect arms A A to said yoke) a central bore will be formed for the introduction of the forward end of sleeve 0, which latter may be rigidly secured in said bore by welding it to the yoke. Instead of constructing yoke S as above described it and the sleeve may be cast in a single piece, or the yoke may be cast in a single piece and rigidly secured in any suitable manner to the sleeve.

Within sleeve 0 is supported shaft L, adapted to slide as well as rotate within said sleeve. This sleeve is of a length sufficient to constitute an extended bearing for shaft L, so that when the latter is moved forwardly or rearwardly its full length there will still be enough of the shaft confined within said sleeve to prevent it from moving laterally when rotated.

On shaft L and in rear of the threaded end N thereof is loosely mounted a block T, to which is secured the bent guiding-bar B, the vertically extending arms thereof being adapted to move in contact with the adjacent edges of arms AA of the spoke-c1amp. The block T and its connected guide-bar B are supported against endwise movement on shaft L by collars U and R, located on opposite sides of said nut and secured to said shaft by the pins V and W.

To a pin 0, which secures the central or bent portion of guide-bar B to block T, one end of pitman F is pivoted, the opposite end of said pitman being pivotally connected to the upper end of lever E by pin K, and the lever E is pivotally connected to loop or band H by the pin D. By means of this lever and its pitman F longitudinal movement in either direction may be impart-ed to shaft L at will by simply moving said lever in the proper direction.

Mounted on the rear end of shaftL is a handle or crank M, by means of which rotary motion is imparted to said shaft.

In order that tenons may be cuton spokes of varying lengths, shaftL is preferably made of a length sufficient to permit its end N, on which the tenon-cutter orother tool isto be screwed, to be moved to a point adjacent to the rear ends of clamping-jaws G G without bringing handle orcrank M in contact with the rear end of sleeve 0.

that the machine might be readily adaptedfor boring holes or for other similar work.

The operation of the machine is, briefly, as follows: A hollow auger or tenon-cutter or other tool of approved design is-first screwed on the threaded end N of shaft L, and the spoke or other article to be operated upon is then clamped between the jaws G G, after which the cutter or other tool is brought in contact with the pointed end of the spoke (which is held between the arms A A) by moving lever E in a forward direction and by rotating crank or handle M,and continuing forward pressure on said lever a tenon will be cut on said spoke to the desired depth. After the tenon has been cut to the desired depth the shaft is returned to its normal position, as shown in Fig. 1, by pressing on lever E in a reverse direction.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of a clamp comprising a yoke and arms pivoted thereto, said arms provided with clamping-jaws, a sleeve projecting from the yoke and communicating with a hole therein, a shaft mounted to rotate and slide in said sleeve and adapted to carry a cutter, a lever pivoted between its ends to the clamp, a block loosely mounted on the shaft, and a pitman connecting the forward end of said lever with said loose block on the shaft.

2. The combination with a yoke, arms attached thereto and jaws at the free ends of said arms, a shaft passing freely through the yoke, means for turning said shaft, a collar 35 encircling the jaws, a lever pivoted to said collar and a pitman connected at oneend With said lever and at the other end with the shaft.

3. In a tool-feeder, the combination with a clamp and a sleeve carried by the closed end of said clamp, of a shaft mounted to rotate and slide in said sleeve, a lever for imparting longitudinal movement to said shaft and a guiding-bar carried by said shaft for supporting the latter against lateral displacement, the outwardly-extending arms of said bar being adapted to move in contact with one face of the clamp, substantially as set forth.

4. In a tool-feeder, the combination with a clamp, a locking device for the jaws thereof and a sleeve carried by the closed end of said clamp, of a shaft mounted to rotate and slide in said sleeve, said shaft being provided with a collar near its forward end for limiting its rearward movement, a block mounted on said shaft and in rear of said collar, a guiding-bar secured to said block, the free ends of said bar adapted to travel in contact with adjacent faces of the clamp, and a lever for imparting longitudinal movement to said shaft, substan' tially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

FRIEDRICH WILHELM FURSTER.

Witnesses:

A. KRIEOHBAUM, GEORGE SMITH. 

